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AIC-6915 Ethernet LAN Controller Programmer’s Manual
MAC Statistic Registers
Type: R/W
Internal Registers Subgroup: MAC Statistic
Byte Address: 7000h - 7FFFh
The following are a list of statistics counters tracked by the MAC block. The “Source” field
indicates the internal logic block that generates the statistics. The “Priority” field indicates
802.3 priority; “M” as mandatory, “R” as recommendation, “O” as optional. All the “M”
and “R” fields are supported. All the “O” fields are listed in descending priority order of
support.
Table 7-109. MAC Statistic Register
Byte
Addr Statistics Source Priority Bits Descriptions
0h Transmit OK Frames. MAC
(TX)
M 32 Count the number of
successfully transmitted
frames.
4h Single Collision
Frames.
MAC
(TX)
M 32 Count frames with one
collision during transmission.
8h Multiple Collision
Frames.
MAC
(TX)
M 32 Count frames with multiple
collisions during transmission.
Ch Transmit CRC Errors. MAC
(TX)
M 32 Transmit frame with error in
CRC field.
10h Transmit OK Octets. MAC
(TX)
R 32 Count the number of octets of
successfully transmitted
frames.
14h Transmit Deferred
Frames.
MAC
(TX)
R 32 Count frames which have to be
deferred when it transmits.
18h Transmit Late
Collision Count.
MAC
(TX)
R 32 Count late collisions during
transmissions.
1Ch Transmit Pause
Control Frames.
MAC
(TX)
R 32 Count the number of frames
transmitted which are control
frames with valid pause
opcode.
20h Transmit Control
Frames.
MAC
(TX)
R 32 Count the number of frames
transmitted which are control
frames.
24h Transmit Abort Due
to Excessive
Collisions.
MAC
(TX)
R 32 Count the number of frames
which were aborted due to
excessive collisions.
28h Transmit Abort Due
to Excessive Deferral.
MAC
(TX)
R 32 Count the number of frames
which are aborted due to
excessive deferral.
2Ch Multicast Frames
Transmitted OK.
MAC
(TX)
O 32 Count the number of multicast
frames successfully
transmitted.
30h Broadcast Frames
Transmitted OK.
MAC
(TX)
O 32 Count the number of broadcast
frames successfully
transmitted.